Ethylamine hydrochloride → (S)-N-ethyl-4-(4-((6-oxo-6,6a,7,8,9,10-hexahydro-5H-dipyrido[1,2-a:3',2'-e]pyrazin-3-yl)methyl)piperazin-1-yl)benzamide

HRID 716258Notes

Reaction equation

HRID 716258 reaction equation
[O:1]=[C:2]1[NH:7][C:6]2[CH:8]=[C:9]([CH2:12][N:13]3[CH2:18][CH2:17][N:16]([C:19]4[CH:27]=[CH:26][C:22]([C:23]([OH:25])=O)=[CH:21][CH:20]=4)[CH2:15][CH2:14]3)[CH:10]=[N:11][C:5]=2[N:4]2[CH2:28][CH2:29][CH2:30][CH2:31][C@@H:3]12.[CH2:32]([N:34](C(C)C)C(C)C)[CH3:33].Cl.C(N)C>CN(C=O)C>[CH2:32]([NH:34][C:23](=[O:25])[C:22]1[CH:21]=[CH:20][C:19]([N:16]2[CH2:17][CH2:18][N:13]([CH2:12][C:9]3[CH:10]=[N:11][C:5]4[N:4]5[CH2:28][CH2:29][CH2:30][CH2:31][C@H:3]5[C:2](=[O:1])[NH:7][C:6]=4[CH:8]=3)[CH2:14][CH2:15]2)=[CH:27][CH:26]=1)[CH3:33]

Participants

5

Reactant 3

HCID 11198Ethylamine hydrochlorideHCID 81531DiisopropylethylamineHCID 58324508(S)-4-(4-((6-oxo-6,6a,7,8,9,10-hexahydro-5H-dipyrido [1,2-a:3',2'-e]pyrazin-3-yl)methyl)piperazin-1-yl)benzoic acid

Product 1

HCID 58324394(S)-N-ethyl-4-(4-((6-oxo-6,6a,7,8,9,10-hexahydro-5H-dipyrido[1,2-a:3',2'-e]pyrazin-3-yl)methyl)piperazin-1-yl)benzamideYield 103.8%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

(S)-4-(4-((6-oxo-6,6a,7,8,9,10-hexahydro-5H-dipyrido[1,2-a:3′,2′-e]pyrazin-3-yl)methyl)piperazin-1-yl)benzoic acid (122 mg, 0.29 mmol) was taken up in DMF (2.9 mL). To the mixture was added N-ethyl-N-isopropylpropan-2-amine (152 μl, 0.87 mmol), O-(7-azabenzotriazole-1-yl)-N,N,N′N′-tetramethyluronium hexafluorophosphate (165 mg, 0.434 mmol), and ethanamine hydrochloride (26.0 mg, 0.318 mmol). The reaction was stirred at room temperature overnight. The reaction was purified via HPLC (10-80 MeCN/H2O, TFA buffered). The fractions were collected and lyophilized to yield 135 mg (85%) of the product as a white solid. 1H NMR (DMSO-d6) δ (ppm): 10.82 (s, 1H), 9.83 (br. s., 1H), 8.25 (t, J=5.6 Hz, 1H), 7.84 (d, J=2.0 Hz, 1H), 7.77 (d, J=8.8 Hz, 2H), 6.94-7.12 (m, 3H), 4.59 (d, J=13.1 Hz, 1H), 4.27 (br. s., 2H), 3.85-4.10 (m, 3H), 3.43 (d, J=10.4 Hz, 2H), 3.21-3.30 (m, 2H), 2.95-3.19 (m, 4H), 2.61-2.72 (m, 1H), 2.05 (d, J=11.8 Hz, 1H), 1.87 (d, J=12.4 Hz, 1H), 1.66 (d, J=12.1 Hz, 1H), 1.31-1.62 (m, 3H), 1.09 (t, J=7.2 Hz, 3H). [M+H] calc'd for C23H27N5O3, 449. found, 449. MP: 232.6° C.

Workup

  1. customThe reaction was purified via HPLC (10-80 MeCN/H2O, TFA buffered)
  2. customThe fractions were collected

Sources & evidence

ORD record
ord-d32367838e5b4b2195b429ce4a2e1d93
Source dataset
uspto-grants-2015_11
Patent number
US09187497B2

Reaction notes

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